HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit

摘要: We report the discovery of HATS-17b, first transiting warm Jupiter HATSouth network. HATS-17b transits its bright (V=12.4) G-type (M$_{\star}$=1.131 $\pm$ 0.030 M$_{\odot}$, R$_{\star}$=1.091$^{+0.070}_{-0.046}$ R$_{\star}$) metal-rich ([Fe/H]=+0.3 dex) host star in a circular orbit with period P=16.2546 days. has very compact radius 0.777 0.056 R$_J$ given Jupiter-like mass 1.338 0.065 M$_J$. Up to 50% may be composed heavy elements order explain high density current models planetary structure. is longest planet discovered date by ground-based photometric survey, and one brightest systems known. The brightness will allow detailed follow-up observations characterize orbital geometry system atmosphere planet.